Fast Stone Capture

If you need to take a screenshot of your screen, you may simply use the PrtScr key on your keyboard. But if you also need to do some basic editing to the captured image, then FastStone Capture is a good option.
FastStone Capture is a minimalist application for taking screenshots that hides a plethora of tools and options under its small interface. The program includes several ways to capture images (full screen, active window, rectangular region, free –hand selected area, even scrolling window!) and works with all popular formats.